Dual-frequency left-handed and right-handed circularly-polarized reconfigurable slot antenna
A technology of slot antenna and circular polarization, which is applied in the direction of slot antenna, antenna, antenna grounding device, etc., can solve the problems that cannot be applied to occasions with large frequency ratio, and achieve the effect of light weight, simple structure and simple design
Pending Publication Date: 2022-04-29
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology
The main problem of the existing dual-frequency circularly polarized antennas is that the two operating frequency bands are relatively close to each other, so they cannot be applied to occasions with large frequency ratios
Method used
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Embodiment
[0053] The dual frequency left and right circular polarization reconfigurable slot antenna of the present invention is manufactured by printed circuit board technology and its size is:
[0054] The dielectric substrate 1 is a polytetrafluoroethylene dielectric substrate with a size of 45mm×52.5mm, a dielectric constant of 4.4, and a loss tangent of 0.0033; the four switching diodes all use Infineon BAR50-03W chips; the first straight The voltage of the DC power supply 10 is 0.95V; the voltage of the second DC power supply 11 and the DC power supply 12 is 1V; the radius of the outer circle of the annular radiation gap 4 is 17.5mm, and the radius of the inner circle is 16.2mm; the length of the microstrip tuning branch 32 is 10mm, and the width is 1.7mm, the width of the first microstrip feeder 31 and the second microstrip feeder 33 is 3mm, the top of the second microstrip feeder 33 is 2.5mm higher than the center of the dielectric substrate 1; the long side of the cross radiatio...
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Abstract
The invention discloses a dual-frequency left-handed and right-handed circularly polarized reconfigurable slot antenna, which comprises a dielectric substrate, the metal ground is located on the upper surface of the dielectric substrate, an annular radiation gap and a cross radiation gap are formed in the middle of the metal ground, the annular radiation gap divides the metal ground into inner side metal and outer side metal, and the cross radiation gap is formed by crossing two main rectangular gaps; secondary rectangular slots orthogonal to the corresponding main rectangular slots are respectively arranged above the same side of the cross radiation slots; the microstrip structure is positioned on the lower surface of the dielectric substrate; the first switching diode and the second switching diode are connected between the metal on the inner side and the metal on the outer side of the annular radiation slot; the pair of metal patches are located at the two ends of each secondary rectangular gap, and each metal patch is connected with the metal ground through a capacitor; and the third switching diode and the fourth switching diode are respectively connected between each pair of metal patches at the two ends of the two secondary rectangular gaps. When the antenna works, the circular polarization bandwidth is wide, and the radiation performance is good.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a reconfigurable slot antenna with dual frequency left and right circular polarization. Background technique [0002] Antennas can realize energy conversion between guided electromagnetic waves and radiated electromagnetic waves, and are key components in wireless communication systems. Compared with linearly polarized antennas, circularly polarized antennas have the advantages of suppressing multipath interference, resisting rain and fog attenuation, reducing polarization mismatch loss, and relaxing the location restrictions of transmitting and receiving antennas. The reconfigurable antenna with left and right circular polarization is beneficial to eliminate the energy fading problem caused by multipath effect, realize frequency reuse and improve the communication capacity of the system. Therefore, designing a reconfigurable antenna with excellent per...
Claims
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IPC IPC(8): H01Q13/10H01Q1/38H01Q1/48H01Q1/50
CPCH01Q13/106H01Q1/38H01Q1/48H01Q1/50
Inventor 蒋成吴晓康徐翀魏斌韦童李建星陈二松
Owner CHINA ELECTRIC POWER RES INST